[leociclon]

hola que tal tengo los siguientes warnings

WARNINGS:
(4932) : warning 219: local variable "idx" shadows a variable at a preceding level
(8040) : warning 203: symbol is never used: "idx"

LINEAS:
(4932): local variable "idx" shadows a variable at a preceding level
(8040): symbol is never used: "idx"

noc cual es el error